PCalc Lite
4+

The Best Calculator

Screenshots

Description

PCalc is the powerful choice for scientists, engineers, students, programmers, or indeed anybody looking for a feature rich calculator. It includes an optional RPN mode and multi-line display, a choice of button layouts, an extensive set of unit conversions and constants, a paper tape, multiple undo and redo, engineering and scientific notation, as well as support for hexadecimal, octal, and binary calculations.PCalc Lite is a fully functional and free taste of our very popular scientific calculator. It includes an optional RPN mode, multiple undo and redo, unit conversions and constants, as well as two stylish themes and our highly praised design. A great choice for your new iPad!

If you like what you see, the full version has many more settings and themes, a paper tape, engineering and scientific notation, and full support for hexadecimal, octal, and binary calculations. You can also now purchase extra features directly from inside PCalc Lite. Buy them individually, or buy everything.

Includes an Apple Watch app, so you can calculate on your wrist!

What's New

Version History

3.7.7

Jul 21, 2018

Fixed a problem with operator precedence and powers.

3.7.6

May 22, 2018

Added support for measuring angles with grads in trigonometry functions.Added a button to erase all settings and iCloud data.Fixed a problem searching for units in the conversion section.Fixed a problem pasting values with a unicode minus sign.

With the "Theme Pack" installed:Added a new theme, "Dark Night".

With the "Engineer Pack" or "Programmer Pack" installed:Added a "Percentage Total" (%T) button to the layout editor.

With the "Power User Pack" installed:Added an option to display SI prefixes in Engineering display mode.Renamed "Use Constant Functions" to the more obvious "Repeat Operation on Equals".

3.7.5

Mar 29, 2018

The display is now smarter about using the available space.The About screen now has an ambient electronic soundtrack composed by Squillopian.Improved the iPhone X support yet again.

With the "Power User Pack" installed:Added an option to show x10 in scientific notation, in the Advanced settings.

With the "Multi Line Pack" installed:Added options to turn off the labels and info on the display.

With the "Engineer Pack" or "Programmer Pack" installed:You can now use hyperbolic trigonometry in user functions and conversions.

With the "Theme Pack" installed:You can now change the tint color for the themes "A Touch of Color", "Blue Sun", "Brawn", "Flux", "Primary Colors", "Rough Draft", and "Widget".

3.7.4

Feb 9, 2018

With the "Conversion Pack" installed:Added Icelandic Króna to the currency conversions.Fixed a problem loading the currency rates.

With the "Multi Line Pack" installed:Fixed a problem with the "Decimal X Register" line type.

With the "Engineer Pack" or "Programmer Pack" installed:Fixed a problem importing and syncing custom layouts.

With the "Power User Pack" installed:Fixed a problem with the 3D Touch tape display not being scrolled to the end.

3.7.3

Nov 17, 2017

Improved the iPhone X support a little bit more.

3.7.2

Oct 31, 2017

Improved the iPhone X support.Added leaderboards and achievements to the About screen.

3.7.1

Oct 13, 2017

Fixed a problem with the binary line display.Fixed a problem with button labels drawing too small.Fixed a problem with the chosen splitscreen layout being forgotten.Added mini About screen to the Apple Watch app.Added "Level 2" to the About screen.†

With the "Power User Pack" installed:Added an option to set the maximum denominator for the fraction display mode.

† Level 2 requires iOS 11 and a device with an A9 processor or later. Look for the golden banana.

3.7

Sep 15, 2017

Added full support for iOS 11, including drag and drop support, and even a (silly) bonus AR calculator mode in the About screen in the Help.†Support for the iPhone X. Completely rewrote the display code. Many exciting things to come later which are now possible because of this, but some changes today!You can now adjust the size of the digits in the display, and make them much bigger or smaller.You can now use a space for the thousands separator.Fixed a problem with the normal layout being reset if you opened the app in splitscreen.Added an edit cursor option to the Accessibility section.Added a few more alternate icons, for old times' sake.There might be a small game in the About screen too.†

With the "Engineer Pack" or "Programmer Pack" installed:Hex, octal, and binary numbers are now grouped using spaces on the display.Added a arbitrary base "Log N" button to most of the advanced layouts, and you can edit other layouts to add one.

With the "Multi Line Pack" installed:You can now have lines displayed in two columns on a horizontal iPhone or iPad.

With the "Theme Pack" installed:Added a variety of new digit styles.

With the "Power User Pack" installed:Added an option to use haptic feedback for buttons in the "Key Click" section of the settings.Fixed a display problem with the tape and the "Show implied parentheses" option.

With the "Conversion Pack" installed:You can now edit and reorder the list of favorite currencies.Fixed a crash if you pressed on a conversion, function, or constant category name while editing.

† The fancy 3D/AR About screen needs a recent device that supports Metal, ideally an iPad Pro or an iPhone 7/7+ or later. The 3D stuff requires iOS 10, AR support requires iOS 11. You also need to have tipped or made at least one in-app purchase. Sorry school kids everywhere using the free version!

3.6.8

Jun 29, 2017

Added links for downloading the manual to the Help section.Did we mention there's now a manual?! Yes, after nearly twenty-five years, there finally is. Written by one Glenn Fleishman, it's a general introduction to the app, as well as an extensive list of all the settings and buttons and what they actually do.Fixed a crash when importing settings from an iPhone onto an iPad, or vice versa.

With the "Power User Pack" installed:Added an option to stop themes being applied to menus, in the Advanced section of the settings.

3.6.7

Jun 13, 2017

Added two new alternative icons, "Helms" and "Protocol Gold".Fixed a display problem on the 10.5-inch iPad Pro.

With the "Theme Pack" installed:Added a gray theme tint.

With the "Power User Pack" installed:Fixed a problem with "Gravity Mode" leaving buttons at an angle when switched off.

3.6.6

Jun 2, 2017

Added a "Resend Tips to Other Devices" button to the tip jar. That should help if your tip didn't show up on them for some reason.Added four new alternative icons, "Deep Purple", "Unicorn", "Baker", and "T-1000".Added a "Deep Purple" theme tint.Squircles everywhere!

With the "Power User Pack" installed:Added a weird "Gravity Mode" option in the Advanced section of the settings.

3.6.5

May 25, 2017

Fixed a problem with the alternative icon being reset if the app is quit. Sorry!

In 3.6.4:Added an option to change the app icon on iOS 10.3 or later (if the icon doesn't change on the home screen, restart your device and that will fix it - iOS bug, sorry!).Along with the ability to change the icon between the existing blue and orange versions, there are nineteen more icons to choose from including lots of colors and some old designs going way back to 1992. To unlock those icons, we've added an optional tip jar.Since we've never charged for an update, this is an experiment to see if people feel like dropping some extra coins into the jar as a way of supporting the release of new versions. Even if you don't tip, you'll always have the full functionality available.Added a new "Hot Pink" tint color for the "Samurai", "Samurai Night", and "Backlight" themes.Now blink the display if you press Equals and the answer is the same as the previous number shown.Now the change sign button doesn't finish entering a hex, octal, or binary number, so you can keep editing it.Now supports pasting of Arabic-Indic numerals.The "TC" button now correctly deactivates 2nd functions.Fixed a crash when tapping "Reset to Defaults" in settings.Fixed a crash if you toggled the RPN setting after tapping "Done" in the Advanced section of the settings.

3.6.4

May 23, 2017

[NOTE: There's a small bug in 3.6.4 that resets the alternative icon to the default if the app is quit. 3.6.5 fixes this and should be with you shortly!]Added an option to change the app icon on iOS 10.3 or later (if the icon doesn't change on the home screen, restart your device and that will fix it - iOS bug, sorry!).Along with the ability to change the icon between the existing blue and orange versions, there are nineteen more icons to choose from including lots of colors and some old designs going way back to 1992. To unlock those icons, we've added an optional tip jar.Since we've never charged for an update, this is an experiment to see if people feel like dropping some extra coins into the jar as a way of supporting the release of new versions. Even if you don't tip, you'll always have the full functionality available.Now blink the display if you press Equals and the answer is the same as the previous number shown.Now supports pasting of Arabic–Indic numerals.Fixed a crash when tapping "Reset to Defaults" in settings.

With the "Theme Pack" installed:Added a new "Hot Pink" tint color for the "Samurai", "Samurai Night", and "Backlight" themes.

With the "Engineer Pack" or "Programmer Pack" installed:Now the change sign button doesn't finish entering a hex, octal, or binary number, so you can keep editing it.The "TC" button will now correctly deactivate 2nd functions.

With the "Power User Pack" installed:Fixed a crash if you toggled the RPN setting after tapping "Done" in the Advanced section of the settings.

3.6.3

Jan 27, 2017

Added the ability to export all settings and user data from PCalc into a single file, send that to another device or to somebody else, and import everything again into a different copy. Works between PCalc and PCalc Lite too.Instead of offering an "Upgrade Pack" in-app purchase, PCalc Lite now lets you buy the full version of the app directly. All other in-app purchases are unchanged, and the "Upgrade Pack" still works exactly as before if already purchased, giving identical functionality to the full app. But hopefully this should reduce confusion with people expecting the icon and name to change.Fixed a problem with prices being cut off for some currencies in the PCalc Store.

With the "Power User Pack" installed:Added an option to the "Advanced" settings to show labels on the buttons for 2nd functions.Fixed a problem displaying fixed scientific notation with zero decimal places.

With the "Engineer Pack" or "Programmer Pack" installed:Added support for display of UTF-32 characters in the registers / stack section.Fixed a problem adding the multiply button when editing layouts in non-decimal modes.

3.6.2

Oct 3, 2016

Rounding is now back to the "Nearest or Even" rule by default, by popular demand.

With the "Power User Pack" installed:Added a new "Rounding" section to the Advanced settings, which controls the display, as well as the behaviour of the "Round" button.Added an option to the Apple Watch app to stop it automatically switching back to the number pad.Fixed a problem with the "Fraction" display mode on 32-bit devices.

3.6.1

Sep 23, 2016

Improved support for iOS 10 and watchOS 3.Added support for haptic feedback on the iPhone 7 and 7 Plus.Fixed a problem with the widget not loading on an iPhone 7 Plus.Fixed a problem pasting in fractions of the form "2 3/4".

With the "Power User Pack" installed:Added an option to display improper fractions in "Fraction" display mode.

With the "Engineer Pack" or "Programmer Pack" installed:Round function now always rounds half upwards to the nearest integer.

3.6

Sep 12, 2016

Added support for iOS 10 and watchOS 3, including a brand new widget and an updated watch app.

iOS:New look widget on iOS 10, including a mini calculator when you 3D Touch the PCalc icon.Added an option to use key clicks in the widget.Improved the key clicks, and added some new options for them. Stereophonic sound!Now display all shortcuts when you hold down the Command key on a physical keyboard.Now handle the keyboard being shown in another app when in splitscreen on an iPad.Now use monospace digits throughout the app for better readability.The widget now respects the "Bold Key Text" accessibility option.Fixed a crash when going into the "Accessibility" section on iOS 8.The color pickers now display the name of the selected color.Various fixes for VoiceOver.Added support for game controllers. Yes, really.

watchOS:Added a dedicated dictation button, and Scribble support on watchOS 3.You can swipe left and right to switch section on watchOS 3.You can use the digital crown to adjust the current number on watchOS 3.Added a constants section.

With the "Power User Pack" installed:Added a new "Fraction" display mode that shows the closest fraction for the current decimal result.Added an option to lock the calculator orientation in either portrait or landscape - iPhone only for now.You can now change the display mode from the menu that appears when you double-tap the display.Fixed a performance problem with the ticker tape.

With the "Theme Pack" installed:LCD digit, background, and theme colors are now remembered separately for each theme.You can now set the brightness threshold when the automatic night mode activates.

With the "Engineer Pack" or "Programmer Pack" installed:Now show "HEX", "OCT", or "BIN" in the display to better indicate the current base.You can now choose the style of buttons when editing a layout.Made it harder to accidentally trigger the layout editing mode.Fixed a display problem with parentheses in the tape.Fixed a crash when resetting an edited layout.

3.5.3

Mar 23, 2016

Brand new icon!Added a unit conversion section to the Apple Watch app.Added a watch complication to quickly access the Apple Watch app.Added a warning the very first time you try to switch on RPN mode.Changed the number entry and delete key behaviour to be more sensible for decimals and exponents.Fixed a problem with the theme resetting to "Samurai" if you used the automatic night theme option.Fixed a problem with the minus sign not always displaying properly with the LCD digit style.Fixed a problem with the "Use Animations" accessibility setting not applying to the splash screen.Fixed a problem with VoiceOver for the tape, registers, and RPN stack.Fixed a problem with existing numbers not being pushed to the RPN stack when starting a new one with the decimal or "Exp" keysFixed a problem with Handoff from the Apple Watch.

With the "Multiple Line Pack" installed:You can now have eight lines of display on a horizontal iPad Pro.

With the "Power User Pack" installed:Added an option to use E notation for the main display rather than superscript numbers.You can now specify certain settings like RPN mode and number of decimal places separately for the app, watch, and widget.The display mode setting is now used by the watch and widget.Moved the watch and widget settings into separate new sections.Fixed a problem with hiding the status bar when running in split-screen.

With the "Engineer Pack" or "Programmer Pack" installed:Added a quick "Reset All Buttons…" command to the layout editing alert if there are any changes.Fixed a problem emailing the tape or registers when you 3D Touch the display to peek at them.

3.5.2

Oct 8, 2015

Added support for 3D Touch on the iPhone 6s and iPhone 6s Plus.Added 3D Touch icon shortcuts for quick access to PCalc functionality.Fixed a problem with pasting into PCalc on iOS 7.

With the "Power User Pack" installed:Added a new "3D Touch" section to the settings to configure the shortcuts.

With the "Engineer Pack" or "Programmer Pack" installed:Press the display to peek at the tape, registers, or RPN stack.Fixed a problem with the “Programming” layouts.

3.5.1

Sep 24, 2015

More support for iOS 9 and watchOS 2.Watch app now gives haptic feedback for button taps.Added a new "Accessibility" section to the settings with options to make PCalc easier to use.Added an option to increase the size of the text on the tape.Text in the settings and other sections now respects the system text size.Fixed a problem where "Error" could get stuck on the screen forcing you to quit the app.Fixed a problem with multiplying or dividing by percentages.Fixed a problem with Handoff not using your RPN setting.The "Programmer Pack" was accidentally left switched on by default in 3.5 but this has now been fixed - hope you enjoyed the free taste!

With the "Power User Pack" installed:Added an option to turn off the watch haptic feedback in the Advanced section of the settings.The "Use Phone Layouts" option in the Advanced section of the settings now applies to split-screen multitasking as well.

3.5

Sep 15, 2015

Added support for iOS 9 and watchOS 2.Added support for split-screen multitasking on iPad.Added native Apple Watch app. The watch app now requires watchOS 2.Added support for Handoff from the Apple Watch app to your other devices.Changed behaviour of the percentage key in algebraic mode to match the Apple calculator - old behaviour still available via "Display Percentage Result" option in Advanced settings.The tip calculator in the Apple Watch app now uses the digital crown for setting the inputs and shows the split, tip, and total all at once.Now display "Error" rather than just blinking the display on an incorrect operation.Fixed a problem switching layouts with only the "Programmer Pack" installed.

With the "Engineer Pack" or "Programmer Pack" installed:Added new functions to the layout editor.Added a delta percentage button to most layouts as the 2nd function of percentage.

With the "Power User Pack" installed:Added an option to switch off dictation on the Apple Watch in the Advanced section of the settings.Added options to control the speech rate and volume when speaking actions and results.

We hope you like this release! If you have any questions, please email us at pcalc@dragthing.com.

3.4.1

Jun 10, 2015

Added support for dictating numbers and simple calculations into the Apple Watch app - just tap the display.Added an ellipsis to the tip calculator on the Apple Watch app, to better hint that tapping the result will cycle through different values.You can now paste simple calculations into PCalc.Fixed a problem with the button layout of the Apple Watch app when bold text was switched on in the watch settings.Fixed a problem with copying from the tape in a custom layout.

3.4

May 19, 2015

[NOTE: If you're having a problem installing via iTunes, try downloading directly via the App Store app on your device. And send me an email - thanks!]Added support for the Apple Watch - now you can use PCalc without taking your phone out of your pocket! Includes a full calculator app, a tip calculator, and a glance to see the result of your most recent calculations.

Added a warning message to avoid accidental layout editing.

3.3.2

Oct 7, 2014

Fixed a problem with the widget on a landscape iPhone 6 Plus.

3.3

Sep 17, 2014

Added full support for iOS 8.Added support for the iPhone 6 and iPhone 6 Plus.Added a Notification Center Widget on iOS 8 to perform quick calculations. Tap the display to switch to the full app.Added support for Handoff on iOS 8 to continue the current calculation on another device.All text fields are now drawn to match the current theme.Improved hardware keyboard support and added new keyboard shortcuts.Fixed a problem with operator precedence.

With the "Engineer Pack" or "Programmer Pack" installed:Added support for layout editing - just tap and hold on any button to begin. You can even add dedicated buttons that perform conversions, run functions, or enter constants, too!

With the "Multi Line Pack" installed:The display now shrinks down to a single line when you are in other sections to maximise visibility.

With the "Power User Pack" installed:Added an option to switch off operator precedence entirely.Added an option to only show the RPN stack in the "Stack" section and keep it scrolled to the bottom.

Jul 21, 2018

Version 3.7.7

Fixed a problem with operator precedence and powers.

Ratings and Reviews

4.5 out of 5

70 Ratings

70 Ratings

iPhone X, iOS 11.x

Apr 9, 2018

downgraydd3r

Orders of magnitude better than the stock calculator and so many others. The option to add only the additional features that one requires make for an affordable, intuitive experience. Look no further if you want an app that is maintained consistently and always works with the latest devices (even the free version without any additional features unlocked) because PCalc Lite delivers. These are the developers that we should support.

iPhone X, iOS 11.x

Apr 9, 2018

downgraydd3r

Orders of magnitude better than the stock calculator and so many others. The option to add only the additional features that one requires make for an affordable, intuitive experience. Look no further if you want an app that is maintained consistently and always works with the latest devices (even the free version without any additional features unlocked) because PCalc Lite delivers. These are the developers that we should support.

Highly recommended

Nov 18, 2017

Reluctant Lemming

I Purchased PCalc and was immediately impressed. Honestly, this app has no peer. Fully customizable, with deep and thorough functionality, it’s hard to imagine anything could be better. After trying the Lite version I jumped and purchase the additional packs and never looked back. Also, I had reason to contact PCalc with a question and they replied immediately. I was totally impressed. Thank you for a great app PCalc people!

Highly recommended

Nov 18, 2017

Reluctant Lemming

I Purchased PCalc and was immediately impressed. Honestly, this app has no peer. Fully customizable, with deep and thorough functionality, it’s hard to imagine anything could be better. After trying the Lite version I jumped and purchase the additional packs and never looked back. Also, I had reason to contact PCalc with a question and they replied immediately. I was totally impressed. Thank you for a great app PCalc people!

Engineering decimal places

Nov 11, 2017

KJandBA

Overall, an excellent calculator app. Will award that 5th star when the Engineering Decimal Places is fixed.

Correct implementation will show the same number of significant digits as specified. The flawed implementation controls only digits after the decimal. Thus the significant digits shown is different depending on value. Very annoying. (See HP for correct approach.)

If this is all that’s wrong, then these folks have produced a top quality product. Hope y’all fix it!

Engineering decimal places

Nov 11, 2017

KJandBA

Overall, an excellent calculator app. Will award that 5th star when the Engineering Decimal Places is fixed.

Correct implementation will show the same number of significant digits as specified. The flawed implementation controls only digits after the decimal. Thus the significant digits shown is different depending on value. Very annoying. (See HP for correct approach.)

If this is all that’s wrong, then these folks have produced a top quality product. Hope y’all fix it!